package main

import (
	"fmt"
	"strconv"
	"strings"
)

func main() {
	name := "hello"

	fmt.Println(strings.ToUpper(name))
	fmt.Println(strings.ToLower(name))

	age := 25
	//fmt.Println("hello"+ age)
	fmt.Println("hello" + strconv.Itoa(age))
}
